TCP tunnels can freeze terminal

[danthe3rd]

Hello,

When transferring a lot of data over a TCP tunnel, the terminal freezes during the transfer (also happens to me for regular SSH tunnels), and sometimes for even longer (does not happen for regular SSH tunnels). Is there a workaround for this situation? I assume limiting the bandwidth of individual tunnels could help - is there a way to do that?

Repro:

$ et --version  # Client version
et version 6.0.4

# Setup server (Linux)
$ et user@host:8080 -t "9090:9090" -x --jport 8080
$ et --version # Server version
et version 6.0.5
$ iperf -s -p 9090

# Client (MacOS)
$ iperf -c 127.0.0.1 -p 9090
------------------------------------------------------------
Client connecting to 127.0.0.1, TCP port 9090
TCP window size:  344 KByte (default)
------------------------------------------------------------
[  4] local 127.0.0.1 port 54220 connected with 127.0.0.1 port 9090
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  1.87 GBytes  1.60 Gbits/sec

# Now the terminal created by `et` is frozen

(btw the 1.87GB transfer in 10 seconds does not reflect my internet speed - when doing the same test with a regular SSH tunnel, I have 4Mbits/sec)

Thank you!

[MisterTea]

We would need to implement congestion control and QoS. Can you use two connections as a workaround?